Christof13T wrote on 01/23/18 at 08:41:01:


It might not be appropriate to compare a leaky 97mm piston/cylinder to a 95mm piston/cylinder that fits properly.

I really like the 95mm in mine - but I might like the 97mm more?

Maybe there's something stuck in the filter screen above the float valve seat, or the fuel may be leaking by the body of the valve seat do to damage/ old age of the O-ring seal., other than that you maybe right the tip of the valve may well be have a grove in it.

So the problem was multi faceted.
The very tip of the needle was rounded off vs. the sharp point on the one I pulled out of the other carb, and there was a prominent groove where it sat against the seat. The oring between the body and its port was in fact done for. The seat in the body had some crusty varnish. The little screens on both carbs were just fine. The one out of the 96 was a metal screen, the one out of the 06 looks like some kind of plastic. I put the metal one on and reinstalled. The captive plate that holds the body in its port was completely missing from my carb! I robbed the one off the other carb, cleaned it up... and installed it.

The problem persists, but much less intensely. If I place the petcock on reserve... It does not puke. Only while in the on position.

Could the diaphragm in the petcock be making to much pressure in the on position?

absolutely sure about the petcock position.
It does NOT puke fuel while running under the same conditions while in prime. It only does it in the on position. (straight down)

With very light application of pressure to the float to seal the valve makes it pretty much impossible for me to blow air through the fuel inlet.

I have adjusted the tang twice now to try to get it to apply more pressure/set the float level a bit lower... to no avail.

Yeah I'm pretty much at the same conclusion.
It gave me crap at every stop sign on the way to the convenience store and back earlier. The body has a new oring and made a good seal when I put it all back together. The needle I robbed out of the other carb looked brand spanking new. Not a single visible flaw on the rubber seal tip.
The bore and seat were free of any debris, pitting, scratches, etc...
I'll get one ordered as soon as funds allow. Stuff kind of sucks right now.

GT61 TURBO ZX14 wrote on 01/25/18 at 01:43:54:


You can get one at your local Yamaha dealer - it is part #5LP-24500-01-00

You can also get them on eBay - but there are a lot of Chinese copies.  If you don't see the part number, the white box, and the words genuine Yamaha - keep looking.

LkAAOSwmfhX4r09&vxp=mtr" target="_blank">https://www.ebay.com/itm/NEW-YAMAHA-RAPTOR-660-YFM-660R-OEM-FUEL-VALVE-SHUTOFF-PETCOCK-5LP-24500-01-00/273036522513?epid=1023314198&hash=item3f923eb411:gLkAAOSwmfhX4r09&vxp=mtr

So my puking vent tube issue seems to clear up with a rise in ambient temperature. Today it did not give me any problems. I ran it in the on position until it ran out of gas and I had to switch it to res. It took about 2 seconds or so to pick back up once I switched it. Was almost to the house already so I will fill it up in the morning on my way to where I gotta go and get a rough guestimate of efficiency. Have no idea how much of it was just blown out the vents, and I neglected to capture the 6 or 7 bowls full of fuel that were either flushed, or dumped when I pulled the bowl so many dang times. I guess the bike, like me... just disagrees with the cold? lol

I did add an accessory this evening that made a world of difference for riding in the cold... It now has a windshield.
Will get a pic posted of it tomorrow morning after the bags I picked up are installed.

It feels so good to have it back on the road. It's just such a fun little bike! I'm falling in love with it all over again.

Trying again with the picture...